Copper Sulfate Pentahydrate - Crystals - 25.2% Cu - 5 Pounds

I found a drain in my garage that hasn't been used in at least 23 years. (previous owners) I installed a sink and found the drain was clogged. It would take a few hours to drain a few gallons of water. I tried all the typical drain cleaners and nothing worked for months.. I used this and used a little each day or twice a day. After about two weeks the drain is now open enough to drain faster than I can fill it up.It dissolved well and worked for me. I will order more and use it once in a while to keep the roots from returning in my drain pipe.

Fast shipping and received as advertised

You still have to add chlorine but not as much. keeps my 11,000 gallon pool sparkling blue, im happy with this product .

Good performance , easy to use , versatile and safe to use

I use this copper sulfate to fight tree root invasion of a home sewer line. I believe it works well as long as I use it routinely. I read that small, more frequent doses are more effective than larger, less frequent doses so I use about 1/3 of a cup flushed down a toilet every 2-3 weeks.NOTE: Copper sulfate is a preventive measure. If you have a severe root blockage you will likely need to have your sewer line "rooted out" to mechanically cut the roots. Then proceed with routine use of the copper sulfate to prevent.

This is for Copper Sulfate Pentahydrate Crystals Same day results, and better next day after good brushing and washing filter. No foaming as with other liquid I tried first, also from amazon. But when I came across this product, I knew it would work well, as I had seen a pool tech guy using this in my pool last year when I had green water in my old pool, which has several palms around it and other vegetation. I used the teaspoon for each 1,000 gal of water doses that another reviewer posted in his review. Is good to have something affordable and effective on hand, and can't wait until I can afford to refinish the pool, which is really necessary in my case.

I don't like having to mix the crystals in water, but I like even less paying much more for liquid solution ready to use. I just have to mix one pound or so in five gallons of water and wait for it to dissolve. I throw the water into my pond all around the edges for quicker distribution through the water. If there are crystals are left undissolved, I just leave them and add more to mix a new batch. I take care not to add too much treatment to the pond because it is caustic to fish, frogs, turtles, and other aquatic life if applied at too great a concentration. Treatments need to be repeated periodically--unless I've put too much in the first time!

Large crystals didn't dissolve when I tested them in water. Almost looks like small pebbles coated with copper sulfate. I won't buy this brand again.